Led Display - ROBBE HeliCommand 3A Manual De Instrucciones

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LED Display

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Pilot channel
We recommend that you use this auxiliary channel as it enables you to switch
between the three modes, and also to set the desired stabilisation power. It
is advisable to use a slider or a three-position switch with selectable output
values for the pilot channel. The gain (sensitivity) must be adjusted to suit the
model.
If the pilot channel is not connected to the receiver, a pre-set value applies
which is: position mode with a setting of +70%; this is a suitable setting for many
models, and can be changed to any value you like using the PC adaptor.
Slider more towards the center redu-
ces the sensitivity and slows down
the auto pilot corrections.
Additionally, the auto pilot can be
overridden by smaller stick defl ec-
tions.
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Description of facilities
Basically the HeliCommand offers three different modes of operation:
LED red = auto-pilot function switched off
LED yellow = horizontal mode
LED green = position mode
Horizontal mode („yellow yellow"): moves the helicopter to the horizontal attitude if
you release the aileron (roll-axis) and elevator (pitch-axis) controls.
This works totally independently of the optical quality of the ground surface.
For indoor fl ying you should select this mode; if you do not wish to, please read
the notes on page 29.
Position mode („green"): in this mode the unit stabilises the model's position
as well as its horizontal attitude. This is the most powerful stabilisation, and
is ideal for "automatic" hovering and slow circuits. It works most effectively at
heights of about 0.5 to 2 metres above a natural surface (grass, gravel etc.).
If you release the aileron and elevator controls, the system actively brakes the
helicopter until it is stationary; all the pilot has to control is the collective pitch /
throttle function. If the model exhibits any slow drift at the hover, this can very
easily be corrected manually. For slow circuits close to the ground, you can set
a forward speed by keeping a slight constant push on the elevator stick, then
direct the model using the tail rotor stick (just like steering a car).
For higher speed and for fl ying at heights above about 5 m, this mode would
tend to be a nuisance because of its corrective actions; in this case you should
switch to horizontal mode („yellow").
RIGID mode: this is a fourth mode of operation only available with the
HeliCommand RIGID: it is designed for fl ybar-less rotor heads, stabilising and
maintaining the helicopter's attitude (see page 5).
Rigid mode can be combined to working parallel with the three modes descri-
bed above. These options are explained on page 26.
In addition to the previously described auto-pilot functions, the HeliCommand
offers the following supplementary functions:
swashplate mixer, tail rotor gyro, and automatic trim.
Tail rotor gyro
The HeliCommand features an integral gyro with piezo sensor, which can be
operated in either normal or heading-lock mode. A second auxiliary channel
("AUX channel") is used to adjust the gain setting, and to switch between hea-
ding-lock and normal mode.
If the AUX channel is not connected to the receiver, the internal default setting
applies. This is heading hold mode set to about +65%; it can be adjusted using
the PC adaptor.
If you detect a tendency for the helicopter to oscillate (tail swings to and fro),
use a faster tail rotor servo, or reduce the gyro gain using the AUX channel or
PC. The gyro is suitable for use with high-speed digital servos.
Further adjustments can be made using the PC adaptor, e.g. travel limiting
and collective pitch > tail rotor mixing; the latter is mixed in after the gyro, and
therefore also works in heading lock mode.
The versions 3D and Rigid provide additional „expert" adjustments e.g. delay
and "hold"- range".
If you do not wish to use the integral gyro, an external gyro can be connected
directly to the receiver. In this case please note the following points:
1. Yaw turn rates above 400° / sec. are not allowed, since they might
seriously disturb the stabilisation system.
2. If you subsequently decide to use the internal gyro, you must fi rst erase
any internal auto-trim values, and check the sensor direction of the gyro.
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